Palette used by FF3us/FF6j, written by Lord J
lord_j@hotmail.com, http://www.angelfire.com/pq/jumparound/index.html


32 bytes are used for one palette settings.
Two bytes are used for one color. Each color is coded
RGB, with 5 bits per basic color, wich leaves 1 extra bit for 
transparency (not used for wall paper settings tough).

Here is the encoding of one color:

<--- byte n -->   <- byte n+1 -->
msb         lsb   msb         lsb
x x x x x x x x   x x x x x x x x
____] [_______]   | [_______] [__
3lsb    5bits     |   5bits   2msb
green    red      |   blue    green
                  |
                  \__transparency bit


The 2 bytes are inverted: this is the way the CPU stores 16 bits info
in memory (8-bits LIFO).


Analysis on WP palette information:
base: 0x2D1E00, 32 bytes per WP, 8 WP in total

offsets:
00 and 01: unused colors (set to 0000 -> black)
02 to 0f included: palette for wp (7 adjustable RGB colors)
10 to 1f included: unused color (all set to 00-38 -> dark blue)

those undecoded bytes were unused colors, so each palette would
hold a maximum of 16 colors